Question

Solve the above equation​

Answer 1

Answer:

Option B [3ab (4a + 5b)] is the right answer

Step-by-step explanation:

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Answer 2

Answer:

We have

12a²b = 2 × 2 × 3 × a × a × b.

15ab² = 3 × 5 × a × b × b.

The two terms have 3, a, and b as common factors.

Therefore,

12a²b + 15ab²

= (3 × а × Ь × 2 × 2 × а) + (3 × а × b × 5 x b)

= 3 × a × b × [(2× 2 x a) + (5 х b)]

..(combining the terms)

= 3ab x (4а + 5b)

= 3ab(4a + 5b)

..(required factor form)